CN110725816A - Rock drilling hydraulic system - Google Patents
Rock drilling hydraulic system Download PDFInfo
- Publication number
- CN110725816A CN110725816A CN201910991210.4A CN201910991210A CN110725816A CN 110725816 A CN110725816 A CN 110725816A CN 201910991210 A CN201910991210 A CN 201910991210A CN 110725816 A CN110725816 A CN 110725816A
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- oil
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- rock drill
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- 239000011435 rock Substances 0.000 title claims abstract description 75
- 238000005553 drilling Methods 0.000 title claims description 13
- 239000000872 buffer Substances 0.000 claims description 10
- 239000007853 buffer solution Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 abstract description 212
- 239000010720 hydraulic oil Substances 0.000 abstract description 7
- 230000009471 action Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
- E21B7/022—Control of the drilling operation; Hydraulic or pneumatic means for activation or operation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a hydraulic system of a rock drill, which comprises an oil tank (4), oil pumps (1, 2 and 3) connected in series, an impact hydraulic valve (5), a drill arm pressure control valve (6), a pressure sensor (7), a rock drill (8), a propulsion pressure control valve (9), a proportional multi-way reversing valve (10), a propulsion oil cylinder (11), a rock drill motor (12) and a proportional reversing valve (13); the oil pumps (1, 2 and 3) are connected through bolts and splines; the oil tank (4) is communicated with the oil suction ports (S1, S2, S3) and the oil drainage ports (L1, L2) of the oil pumps (1, 2, 3) through high-pressure oil pipes. The invention simplifies the hydraulic system, reduces the leakage of hydraulic oil and improves the reliability of the system.
Description
Technical Field
The invention belongs to the technical field of rock drill hydraulic systems of underground rock drilling rigs, and particularly relates to a rock drill hydraulic system.
Background
The rock drill impact control of the underground rock drilling rig completes the impact operation of the rock drill through the interaction of a manual operation valve, a hydraulic control reversing valve and the like. All control is achieved by pilot operated valves in the hydraulic system. The disadvantages of such a system are: the system is complex, the pipelines are various, the failure is frequent, the reason is not easy to find, and the leakage is easy.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a rock drilling hydraulic system, which is used for improving the reliability of an impact hydraulic system of a rock drilling machine, simplifying a hydraulic pipeline and reducing hydraulic oil leakage.
The invention is realized by the following technical scheme.
A rock drilling hydraulic system comprises an oil tank, an oil pump, an impact hydraulic valve, a drill boom pressure control valve, a pressure sensor, a rock drill, a propulsion pressure control valve, a proportional multi-way reversing valve, a propulsion oil cylinder, a rock drill motor and a proportional reversing valve which are sequentially connected in series; the three oil pumps are connected through bolts and splines; the oil tank is communicated with the oil suction port and the oil drainage port of the oil pump through high-pressure oil pipes.
As a further improvement of the invention, the oil tank, the oil pump, the impact hydraulic valve, the pressure sensor and the rock drill form a rock drill impact hydraulic system, and the oil pump is connected with the impact hydraulic valve through a bolt; and the impact hydraulic valve is respectively communicated with the pressure sensor and the rock drill through high-pressure oil pipes. The oil pump control oil port is communicated with the impact hydraulic valve control oil port through a high-pressure oil pipe; the oil tank is communicated with an oil return port of the impact hydraulic valve and impact return oil of the rock drill through a high-pressure oil pipe.
The oil tank, the oil pump, the drill boom pressure control valve, the pressure sensor and the rock drill constitute a rock drill buffer system, and the oil pump is connected with the drill boom pressure control valve through a bolt; the drill arm pressure control valve is respectively communicated with the pressure sensor and the rock drill through a high-pressure oil pipe; the oil pump control oil port is communicated with the control oil port of the drill arm pressure control valve through a high-pressure oil pipe; the oil tank is communicated with an oil return port of the drill boom pressure control valve and buffer return oil of the rock drill through a high-pressure oil pipe.
The oil tank, the oil pump, the drill boom pressure control valve, the propelling pressure control valve, the proportional multi-way reversing valve and the propelling oil cylinder form a rock drill propelling system; the proportional multi-way reversing valve is respectively communicated with the drill boom pressure control valve, the propulsion pressure control valve and the propulsion oil cylinder through high-pressure oil pipes; the oil tank is communicated with the oil return port of the propulsion pressure control valve and the oil return port of the proportional multi-way reversing valve through high-pressure oil pipes.
The oil tank, the oil pump, the proportional reversing valve, the pressure sensor and the rock drill motor form a rotating system; the proportional reversing valve is respectively communicated with the oil pump and the rock drill motor through high-pressure oil pipes, and the proportional reversing valve and the rock drill motor are connected with a pressure sensor through the high-pressure oil pipes. The oil tank is communicated with the oil return port of the proportional reversing valve through a high-pressure oil pipe.
As a further improvement of the invention, a proportional overflow valve, a throttling hole, an electromagnetic reversing valve, a logic valve and a throttling hole are arranged in the impact hydraulic valve; the logic valve and the orifice are connected in parallel; the throttling hole and the proportional overflow valve are connected in series; the orifice and the electromagnetic directional valve 4 are connected in series.
The beneficial technical effects of the invention are as follows: the hydraulic system is simplified, and hydraulic oil leakage is reduced. The reliability of the system is improved.
Drawings
Fig. 1 is a schematic diagram of the oil circuit control of the present invention.
Supplementary explanation is made with reference to the attached drawings: 1. 2-plunger pump, 3-gear pump, P1, P2-plunger pump pressure oil port, P3-gear pump pressure oil port, S1, S2, S3- pump 1, 2, 3 oil suction port, L1, L2-plunger pump 1, 2 leakage oil port, X1, X2-plunger pump 1, 2 control oil port;
4-an oil tank;
5-impact hydraulic valve, T5-oil return port, A5-working oil port and X5-control oil port;
6-a drill boom pressure control valve, T6-an oil return port, an HD-buffer oil port, an A6-a working oil port and an X6-a control oil port;
7-pressure sensor, 8-rock drill;
9-propulsion pressure control valve, LSA, LSB 9-pressure oil port, T9-oil return port;
10-proportional multi-way reversing valve, P9-pressure oil port, LSA1, LSB 2-pushing pressure control oil port and T9-oil return port; a10, B10-working oil ports;
11-a propulsion oil cylinder and 12-a rock drill motor;
13-proportional reversing valve, P13-pressure oil port, T13-oil return port; a13 and B13-working oil ports.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
Further elaboration is provided in connection with the appended drawings. A rock drill hydraulic system: the hydraulic control system comprises an oil tank 4, oil pumps 1, 2 and 3 connected in series, an impact hydraulic valve 5, a drill boom pressure control valve 6, a pressure sensor 7, a rock drill 8, a propulsion pressure control valve 9, a proportional multi-way reversing valve 10, a propulsion oil cylinder 11, a rock drill motor 12 and a proportional reversing valve 13; the oil pumps 1, 2 and 3 are connected through bolts and splines; the oil tank 4 is communicated with the oil suction ports S1, S2 and S3 and the oil drain ports L1 and L2 of the oil pumps 1, 2 and 3 through high-pressure oil pipes.
The oil tank 4, the oil pump 1, the impact hydraulic valve 5, the pressure sensor 7 and the rock drill 8 form a rock drill impact system, and the oil pump 1 is connected with a pressure oil port P1 of the impact hydraulic valve 5 through a bolt; the working oil port A5 of the impact hydraulic valve 5 is communicated with the impact oil port HP4 of the rock drill 8 through a high-pressure oil pipe; and the impact hydraulic valve 5 detection oil port G1 is communicated with the pressure sensor 7.4 through a high-pressure oil pipe. The oil pump 1 control oil port X1 is communicated with the impact hydraulic valve 5 control oil port X5 through a high-pressure oil pipe; the oil tank 4 is communicated with an oil return port T5 of the impact hydraulic valve 5 and an impact oil return HT4 of the rock drill 8 through a high-pressure oil pipe.
The oil tank 4, the oil pump 2, the drill boom pressure control valve 6, the pressure sensor 7 and the rock drill 8 form a rock drill buffer system, and the oil pump 2 is connected with the pressure oil port P2 of the drill boom pressure control valve 6 through a bolt; the buffer oil port HD of the drill arm pressure control valve 6 is communicated with the buffer oil port HDP4 of the rock drill 8 through a high-pressure oil pipe; the buffer oil port HD of the drill arm pressure control valve 6 and the buffer oil port HDP4 of the rock drill 8 are connected with a pressure sensor 7.5 through a high-pressure oil pipe; the control oil port X2 of the oil pump 2 is communicated with the control oil port X6 of the drill arm pressure control valve 6 through a high-pressure oil pipe; the oil tank 4 is communicated with an oil return port T6 of the drill boom pressure control valve 6 and a buffer oil return HD4 of the rock drill 8 through a high-pressure oil pipe.
The oil tank 4, the oil pump 2, the drill boom pressure control valve 6, the propelling pressure control valve 9, the proportional multi-way reversing valve 10 and the propelling oil cylinder 11 form a rock drill propelling system; the working oil port A6 of the drill boom pressure control valve 6 is communicated with the pressure oil port P10 of the proportional multi-way reversing valve 10 through a high-pressure oil pipe; the working oil ports A10 and B10 of the proportional multi-way reversing valve 10 are communicated with the propulsion oil cylinder 11 through high-pressure oil pipes; the pressure control oil ports LSA and LSB of the proportional multi-way reversing valve 10 are connected with the propulsion pressure control valve 9 through a high-pressure oil pipe; the oil tank 4 is communicated with an oil return port T9 of the propelling pressure control valve 9 and an oil return port T10 of the proportional multi-way reversing valve 10 through a high-pressure oil pipe.
The oil tank 4, the oil pump 3, the proportional reversing valve 13, the pressure sensor 7 and the rock drill motor 12 form a rotating system; the pressure oil port P3 of the oil pump 3 is communicated with the pressure oil port P13 of the proportional reversing valve 13 through a high-pressure oil pipe; the working oil ports A13 and B13 of the proportional reversing valve 13 are communicated with the rock drill motor 12 through high-pressure oil pipes, and the working oil port A13 of the proportional reversing valve 13 is connected with the rock drill motor 12 through the high-pressure oil pipe to form a pressure sensor 7; the oil tank 4 is communicated with an oil return port T13 of the proportional directional valve 13 through a high-pressure oil pipe.
The working principle of the invention is as follows: the pumps 1, 2 and 3 are started, hydraulic oil in the oil tank 4 is sucked through an oil suction port S1 of the plunger pump 1, pressure oil pumped by the plunger pump 1 enters the impact hydraulic valve 5 from a port P1, one path of pressure oil enters a control oil port of the logic valve through a throttling hole and an electromagnetic reversing valve, and a valve core of the logic valve is closed under the action of spring force and the pressure oil; one path of the variable mechanism controls the plunger pump 1 through a throttling hole and a control oil port; the proportional relief valve sets the system pressure. When the pressure is set to be zero during starting, pressure oil returns to the oil tank through the proportional overflow valve and the oil return port T5; the pressure is set to be a small value during light impact, the electromagnetic directional valve is used for reversing, control oil of the logic valve returns to the oil tank through the electromagnetic directional valve and the oil return port T5, the valve core of the logic valve overcomes the spring force to be opened under the action of the pressure oil, the pressure oil enters the impact oil port HP4 of the rock drill 8 through the logic valve and the working oil port A5, the rock drill 8 starts light impact operation, and impact oil return HT4 of the rock drill 8 returns to the oil tank. The heavy impact operation and the light impact operation of the rock drill are the same in principle, and only the pressure set by the proportional overflow valve is a larger value. The pump 1 provides different flows according to different set pressure values of the proportional overflow valve to meet the operation requirements of no-load, light impact and heavy impact. The pressure sensor 7.4 reflects the impact pressure value in real time.
Meanwhile, the hydraulic oil in the oil tank 4 is sucked through the oil suction port S2 of the plunger pump 2, and the pressure oil pumped by the plunger pump 2 enters the drill boom pressure control valve 6 from the port P2; one path supplies oil to the proportional multi-path reversing valve 10 through a check valve and a working oil port A6; simultaneously, oil is supplied to the supporting leg system through the one-way valve and the working oil port B; one path of the oil is supplied to a buffer oil port HDP4 of the rock drill 8 through a throttle valve and a working oil port C; one path controls the variable mechanism of the pump 2 through an orifice and a control oil port X6; the pressure is set by a proportional relief valve. When the pressure is set to be zero during starting, pressure oil returns to the oil tank through the proportional overflow valve and the oil return port T5; the pressure sensor 7.5 feeds back the real time pressure of the buffer oil. The buffer system operates.
When the rock drill is pushed, the proportional multi-way valve 10 is reversed, pressure oil from a working oil port A6 enters the proportional multi-way valve 10 through a pressure oil port P10 of the multi-way valve 10, one way of pressure oil enters a rodless cavity of the pushing oil cylinder through a working oil port A10 of the proportional multi-way valve 10, oil in a rod cavity of the pushing oil cylinder enters the proportional multi-way valve 10 through a working oil port B10 of the proportional multi-way valve 10 and returns to an oil tank through an oil return port T10 of the proportional multi-way valve 10, and the pushing oil cylinder stretches out to push the rock drill to advance; one path of the pressure control oil port LSA1 of the proportional multi-way valve 10, the pressure oil port LSA of the propulsion pressure control valve block 9 and the one-way valve enter an electric proportional overflow valve and a pressure sensor, and the propulsion pressure is set by the proportional overflow valve; the pressure sensor detects the boost pressure. The propulsion system is operated.
Meanwhile, the hydraulic oil in the oil tank 4 is sucked through the oil suction port S3 of the gear pump 3, and the pressure oil pumped by the gear pump 3 enters the proportional reversing valve 13 from the port P3; supplying oil to the motor 12 of the rock drill through the one-way valve and the working oil port A13; the return oil of the motor 12 of the rock drilling machine returns to the oil tank through a working oil port B13 and an oil return port T13 of the proportional reversing valve 13, and the pressure sensor 7.3 feeds back the rotation real-time pressure of the motor. The rotating system operates.
The rotary pressure, the impact pressure and the propulsion pressure are mutually related, and the pressure values fed back by the rotary pressure sensor 7.3, the impact pressure sensor 7.4 and the propulsion pressure sensor 9.1 are controlled by a program to realize the rock drilling operation.
The invention simplifies the hydraulic system, reduces the leakage of hydraulic oil and improves the reliability of the system.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention. It should be noted that other equivalent modifications can be made by those skilled in the art in light of the teachings of the present invention, and all such modifications can be made as are within the scope of the present invention.
Claims (5)
1. A hydraulic system of a rock drill is characterized by comprising an oil tank (4), oil pumps (1, 2 and 3) connected in series, an impact hydraulic valve (5), a drill boom pressure control valve (6), a pressure sensor (7), a rock drill (8), a propulsion pressure control valve (9), a proportional multi-way reversing valve (10), a propulsion oil cylinder (11), a rock drill motor (12) and a proportional reversing valve (13); the oil pumps (1, 2 and 3) are connected through bolts and splines; the oil tank (4) is communicated with the oil suction ports (S1, S2, S3) and the oil drainage ports (L1, L2) of the oil pumps (1, 2, 3) through high-pressure oil pipes.
2. A hydraulic rock drilling system according to claim 1, wherein: the oil tank (4), the oil pump (1), the impact hydraulic valve (5), the pressure sensor (7) and the rock drill (8) form a rock drill impact system, and the oil pump (1) is connected with the impact hydraulic valve (5) through a bolt; the impact hydraulic valve (5) is communicated with the rock drill (8) through a high-pressure oil pipe; the impact hydraulic valve (5) is communicated with the pressure sensor (7) through a high-pressure oil pipe; the control oil port (X1) of the oil pump (1) is communicated with the control oil port (X5) of the impact hydraulic valve (5) through a high-pressure oil pipe; the oil tank (4) is communicated with an oil return port (T5) of the impact hydraulic valve (5) and an impact oil return port (HT4) of the rock drill (8) through a high-pressure oil pipe.
3. A hydraulic rock drilling system according to claim 1, wherein: the oil tank (4), the oil pump (2), the drill boom pressure control valve (6), the pressure sensor (7) and the rock drill (8) form a rock drill buffer system, and the oil pump (2) is connected with the drill boom pressure control valve (6) through a bolt; the drill boom pressure control valve (6) is communicated with the rock drill (8) through a high-pressure oil pipe; the drill boom pressure control valve (6) is communicated with the pressure sensor (7) through a high-pressure oil pipe; the control oil port (X2) of the oil pump (2) is communicated with the control oil port (X6) of the drill arm pressure control valve (6) through a high-pressure oil pipe; the oil tank (4) is communicated with an oil return port (T6) of the drill boom pressure control valve (6) and a buffer oil return port (HD4) of the rock drill (8) through a high-pressure oil pipe.
4. A hydraulic rock drilling system according to claim 1, wherein: the oil tank (4), the oil pump (2), the drill boom pressure control valve (6), the propelling pressure control valve (9), the proportional multi-way reversing valve (10) and the propelling oil cylinder (11) form a rock drill propelling system; the drill boom pressure control valve (6) is communicated with the proportional multi-way reversing valve (10) through a high-pressure oil pipe; the proportional multi-way reversing valve (10) is communicated with the propulsion oil cylinder (11) through a high-pressure oil pipe; the pressure control oil ports (LSA, LSB) of the proportional multi-way reversing valve (10) are connected with a propulsion pressure control valve (9) through a high-pressure oil pipe; the oil tank (4) is communicated with an oil return port (T9) of the propelling pressure control valve (9) and an oil return port (T10) of the proportional multi-way reversing valve (10) through a high-pressure oil pipe.
5. A hydraulic rock drilling system according to claim 1, wherein: the oil tank (4), the oil pump (3), the proportional reversing valve (13), the pressure sensor (7) and the rock drill motor (12) form a rotating system; the oil pump (3) is communicated with the proportional reversing valve (13) through a high-pressure oil pipe; the proportional reversing valve (13) is communicated with the rock drill motor (12) through a high-pressure oil pipe, and a pressure sensor (7) is connected between the proportional reversing valve (13) and the rock drill motor (12) through the high-pressure oil pipe; the oil tank (4) is communicated with an oil return port (T13) of the proportional directional valve (13) through a high-pressure oil pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910991210.4A CN110725816A (en) | 2019-10-18 | 2019-10-18 | Rock drilling hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910991210.4A CN110725816A (en) | 2019-10-18 | 2019-10-18 | Rock drilling hydraulic system |
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| Publication Number | Publication Date |
|---|---|
| CN110725816A true CN110725816A (en) | 2020-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910991210.4A Pending CN110725816A (en) | 2019-10-18 | 2019-10-18 | Rock drilling hydraulic system |
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| CN (1) | CN110725816A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0203282A1 (en) * | 1985-05-25 | 1986-12-03 | Ing. G. Klemm Bohrtechnik GmbH | Control of a hydraulic percussive drilling device |
| CN201062489Y (en) * | 2006-09-27 | 2008-05-21 | 李凤咏 | Hydraulic shocker |
| CN102561937A (en) * | 2012-01-20 | 2012-07-11 | 中船重工中南装备有限责任公司 | Adjustable rock drilling control system of hydraulic rock drilling machine |
| CN102996139A (en) * | 2012-11-30 | 2013-03-27 | 中煤科工集团重庆研究院 | Hydraulic control system of drill loader |
| CN102996138A (en) * | 2012-11-30 | 2013-03-27 | 中煤科工集团重庆研究院 | Hydraulic control system of dust removal and outburst prevention integrated heading machine |
| CN103821777A (en) * | 2014-02-28 | 2014-05-28 | 金川集团股份有限公司 | Hydraulic control system with continuously-adjustable power for rock drilling machine |
| CN106150474A (en) * | 2016-09-27 | 2016-11-23 | 桂林航天工业学院 | A kind of hydraulic gate TT&C system |
| CN211501128U (en) * | 2019-10-18 | 2020-09-15 | 金川集团股份有限公司 | Rock drilling hydraulic system |
-
2019
- 2019-10-18 CN CN201910991210.4A patent/CN110725816A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0203282A1 (en) * | 1985-05-25 | 1986-12-03 | Ing. G. Klemm Bohrtechnik GmbH | Control of a hydraulic percussive drilling device |
| CN201062489Y (en) * | 2006-09-27 | 2008-05-21 | 李凤咏 | Hydraulic shocker |
| CN102561937A (en) * | 2012-01-20 | 2012-07-11 | 中船重工中南装备有限责任公司 | Adjustable rock drilling control system of hydraulic rock drilling machine |
| CN102996139A (en) * | 2012-11-30 | 2013-03-27 | 中煤科工集团重庆研究院 | Hydraulic control system of drill loader |
| CN102996138A (en) * | 2012-11-30 | 2013-03-27 | 中煤科工集团重庆研究院 | Hydraulic control system of dust removal and outburst prevention integrated heading machine |
| CN103821777A (en) * | 2014-02-28 | 2014-05-28 | 金川集团股份有限公司 | Hydraulic control system with continuously-adjustable power for rock drilling machine |
| CN106150474A (en) * | 2016-09-27 | 2016-11-23 | 桂林航天工业学院 | A kind of hydraulic gate TT&C system |
| CN211501128U (en) * | 2019-10-18 | 2020-09-15 | 金川集团股份有限公司 | Rock drilling hydraulic system |
Non-Patent Citations (1)
| Title |
|---|
| 郑澈;: "基于多位置油路块的叠加阀集成式凿岩钻车液压系统", 液压与气动, no. 06, 15 June 2012 (2012-06-15) * |
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